diff --git a/Gemfile b/Gemfile
index 7c1cfda..3c30b0f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ gem 'sinatra', '~>2.0.8'
 gem 'activerecord', '~>6.0.3'
 gem 'standalone_migrations', '~>6.0.0'
 gem 'pg', '~>1.2.3'
-gem 'puma', '~>4.3.5'
+gem 'puma', '~>4.3.11'
 
 # For testing
 group :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 0933768..1366593 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,11 +45,11 @@ GEM
       minitest (~> 5.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     pg (1.2.3)
-    puma (4.3.5)
+    puma (4.3.11)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-protection (2.0.8.1)
@@ -94,7 +94,7 @@ DEPENDENCIES
   minitest (~> 5.14.1)
   minitest-around (~> 0.5.0)
   pg (~> 1.2.3)
-  puma (~> 4.3.5)
+  puma (~> 4.3.11)
   rack-test (~> 1.1.0)
   sinatra (~> 2.0.8)
   standalone_migrations (~> 6.0.0)